Portable crane



May 13, 1952 J. z. FEIGELsoN 2,596,846

PORTABLE CRANE Filed Aug. 18, 1949 Jul/'us Z F eige/son INVENTOR.

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Patented May 13, 1952 UNITED STATES PATENT OFFICE PORTABLE CRANE JuliusZ. Feigelson, Beaumont, Tex. Application August 18, 1949, Serial No.110,941

(ci. 25a-139) 1 Claim. 1

The present invention relates to new and useful improvements in portablecranes or hoists of a type usually installed on a motor truck or othertype of mobile load carrying unit.

An important object of the invention is to provide a novel sheave unitmounted at the upper end of the boom and which enables lifting the loadto its maximum lifting height, thus eliminating the loss of liftingheight that results in a type of hoist using a snatch block.

A further object of the invention is to provide guide rollers at rightangles to the axis of the sheave to serve as a guide for holding thecable on the sheave and to permit a sideways pull on the cable withoutdanger of the cable jumping ol the sheave.

A still further object is to provide a device of this character ofsimple and practical construction, which is strong and durable,relatively inexpensive to manufacture and otherwise well adapted for thepurposes for which the same is intended.

Other objects and advantages reside in the details of construction andyoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view;

Figure 2 is a front elevational sheave unit. and

Figure 3 is an enlarged vertical sectional view taken on a line 3-3 ofFigure 1.

Referring now to the drawings in detail, wherein for the purpose ofillustration I have disclosed a preferred embodiment of the invention,the numeral 5 designates a truck body, platform or similar supportingstructure and to the rear or other edge of which a boom 6 composed of apair of upwardly converging supports 1 is suitably supported.

A sheave unit is designated generally at 8 and is of generally A-formwith the lower ends of its legs 9 suitably secured in the upper ends ofthe supports 1. The sheave unit 8 includes a horizontal shaft I orcross-bar at the central portion of which a sheave I I is journaled.

Braclng Webs I2 are welded to the inner sides of each of the legs 9above and below shaft Ill and at each side of sheave II and U-shapedbrackets I3l project rearwardly from the web at each side of sheave Il.

Rollers I4 are journaled on shafts` I5 which project forwardly at eachside of sheave II at right angles to shaft I0, the inner ends of shaftsI being journaled in bearing bosses I6 and the outer ends of `sha-f ,I 5aredournaled in bearings v hangerfrods-,Ig which are welded lorotherwise suitably secured at their view of the winding a hoisting cableextends over the sheave upper ends to the upper portion of the `A-frameA chain I9 connects the brackets I3 to the truck body or platform 5 anda Winch 20 is suitably mounted on the body or platform 5 for 2| thereonand which II and provided with a load attaching hook 22.

In the operation of the device with the sheave or A-frame unit 8 mountedat the upper end of supports 1 the cable 2I may travel over the sheaveto hoist a load attached to hook 22.

The guide rollers I4 will keep the cable centered on the sheave and alsoenable a sideways pull on the load from either side of the sheave, asindicated in Figure 3 of the drawings.

In view of the foregoing description taken in conjunction with theaccompanying drawings it is believed that a clear understanding of theconstruction, operation and advantages vof the device will be quiteapparent to those skilled in this art. A more detailed description isaccordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shownand described a preferred embodiment of the invention the same issusceptible to certain changes fully comprehended by the spirit of theinvention as herein described and the scope of the appended claim.

Having described the invention, what is claimed as new is:

A hoist comprising a boom, an .A-shaped sheave frame forming the upperend of the boom and including across bar, a sheave journaled on thecross bar, bracing webs connected to the ,V upper end of said frame andprojecting inwardly from each side of the frame and centering the sheaveon the cross bar, shafts connected to said cross bar and projectingforwardly from the cross bar at each side of the sheave, rollers on theshafts, and hangers connected to and extending downwardly from the upperportion of the frame and supporting the shafts. ULIUS Z. FEIGELSON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS f Number Name 'Date 1,635,944 LeBlanc July 12,1927 1,795,978 Symonds Mar. 10, 1931 1,918,409 Langdonv July 18, 19332,157,500 Sarseld et al. v May 9, 1939

